Center purlin



FIG. 1 is a perspective view of a shelter illustrating a center purlin location;

FIG. 2 is a perspective view of the support members of the shelter illustrating the location of the center purlin;

FIG. 3 is a perspective view of the center purlin;

FIG. 4 is a side view of the center purlin; and,

FIG. 5 is an end elevation view of the center purlin.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

We claim the ornamental design for a center purlin, as shown and described. 